Service and Repair Manual
July 2021
Manifolds
74
Z
®
-45/25 • Z
®
-45/25J
Part No. 1312350GT
8-11
Valve Coils
How to Test a Coil
A properly functioning coil provides an
electromotive force which operates the solenoid
valve. Critical to normal operation is continuity
within the coil that provides this force field.
Electrocution/burn hazard.
Contact with electrically charged
circuits could result in death or
serious injury. Remove all rings,
watches and other jewelry.
1 Tag and disconnect the wiring from the coil to
be tested.
2 Test the coil resistance.
Result: The resistance should be within
specification, plus or minus 30%.
Result: If the resistance is not within
specification, plus or minus 30%, replace the
coil.
Valve Coil Resistance Specification
Proportional directional solenoid valve, 10V
DC
6 to 8
Ω
(schematic items BP, BU and BY)
3 position 4 way directional valve, 10V DC
6 to 8
Ω
(schematic items BF, BM and CG)
2 position 3 way solenoid valve, 10V DC
6 to 8
Ω
(schematic items CA, CC, AF, AG and AI)
How to Test a Coil Dio de
How to Test a Coil Diode
Properly functioning coil diodes protect the
electrical circuit by suppressing voltage spikes.
Voltage spikes naturally occur within a function
circuit following the interruption of electrical current
to a coil. Faulty diodes can fail to protect the
electrical system, resulting in a tripped circuit
breaker or component damage.
Electrocution/burn hazard.
Contact with electrically charged
circuits could result in death or
serious injury. Remove all rings,
watches and other jewelry.
1 Test the coil for resistance. Refer to Repair
Procedure,
How to Test a Coil
.
2 Connect a 10W resistor to the negative
terminal of a known good 9V DC battery.
Connect the other end of the resistor to a
terminal on the coil.
Resistor 10
Ω
Genie part number 27287
Note: The battery should read 9V DC or more
when measured across the terminals.
Summary of Contents for Genie Z-45/25 Bi-Energy
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Page 73: ...July 2021 Service and Repair Manual Manifolds Part No 1312350GT Z 45 25 Z 45 25J 61 ...
Page 80: ...Service and Repair Manual July 2021 Manifolds 68 Z 45 25 Z 45 25J Part No 1312350GT ...
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